Dietary principles for hyperkalemia patients are mainly low-potassium diet and avoiding fasting, so as not to aggravate patients’ condition with elevated blood potassium. 1. Pay attention to low potassium diet and minimize the intake of potassium-containing foods. Vegetables and fruits such as bananas, oranges, grapes, pumpkin and celery contain relatively high potassium. Therefore, you need to reduce the consumption of high-potassium fruits, and potassium-containing vegetables need to be cooked and eaten. Before eating canned fruits, vegetables or meat it is recommended to remove the liquid in them. 2. Patients are advised to avoid fasting as much as possible, as the transfer of potassium ions to the extracellular compartment can be facilitated under fasting conditions, which in turn raises blood potassium. Patients with hyperkalemia are advised to monitor their blood potassium regularly, and if they experience any discomfort, they are advised to go to the hospital in time.